The temperature on September 18, 1904 was between 5.8 °C and 20.1 °C and averaged 12.5 °C. There was 10.9 hours of sunshine (87%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
January 7 » The distress signal "CQD" is established only to be replaced two years later by "SOS".
April 5 » The first international rugby league match is played between England and an Other Nationalities team (Welsh and Scottish players) in Central Park, Wigan, England.
April 30 » The Louisiana Purchase Exposition World's Fair opens in St. Louis, Missouri.
May 4 » The United States begins construction of the Panama Canal.
July 31 » Russo-Japanese War: Battle of Hsimucheng: Units of the Imperial Japanese Army defeat units of the Imperial Russian Army in a strategic confrontation.
August 23 » The automobile tire chain is patented.
Day of death April 6, 1969
The temperature on April 6, 1969 was between 1.7 °C and 19.0 °C and averaged 10.7 °C. There was 10.9 hours of sunshine (82%). The almost cloudless was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 18 » United Airlines Flight 266 crashes into Santa Monica Bay killing all 32 passengers and six crew members.
March 3 » Apollo program: NASA launches Apollo 9 to test the lunar module.
March 17 » Golda Meir becomes the first female Prime Minister of Israel.
April 1 » The Hawker Siddeley Harrier, the first operational fighter aircraft with Vertical/Short Takeoff and Landing capabilities, enters service with the Royal Air Force.
April 7 » The Internet's symbolic birth date: Publication of RFC 1.
August 9 » Followers of Charles Manson murder pregnant actress Sharon Tate (wife of Roman Polanski), coffee heiress Abigail Folger, Polish actor Wojciech Frykowski, men's hairstylist Jay Sebring and recent high-school graduate Steven Parent.
When copying data from this family tree, please include a reference to the origin: Vera Witteveen-van Dalen, "Family tree of the Mulder and van Dalen families", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-mulder-en-van-dalen/I500671.php : accessed August 10, 2025), "Wilkelina Groen (1904-1969)".
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